Arizona immigration law author and Kansas Secretary of State Kris Kobach is representing 10 immigration agents in a lawsuit filed Thursday against Homeland Security Secretary Janet Napolitano, for policies they say prevent them from doing their job of defending the Constitution.

"They're being ordered by their federal-appointee superiors to break federal law, or if they don't break federal law, according to their orders they will be disciplined," Kobach said Thursday on a call with reporters. "This is an absolutely breath-taking assertion of authority and an abuse of authority."

Numbers USA, a group that advocates for reduction of immigration, is funding the lawsuit on behalf of Immigration and Customs Enforcement agents opposed to current policy. The suit goes after two key Obama policies on immigration: prosecutorial discretion to focus on criminals and repeat offenders, as well as deferred action for undocumented young people.

Kobach, who has advised presumptive GOP presidential candidate Mitt Romney on immigration issues, said that the campaign was aware of the lawsuit and had not expressed concerns with the plan.

ICE announced in August 2011 it would stop deporting some "low priority" undocumented immigrants, such as young people or those with strong ties to the U.S. On June 15, 2012, the administration took that a step further for young people. Now, under deferred action, many will be granted work authorization and two years reprieve from deportation concerns. Read more....